Question

I am having more problems with my converting of vb.net to c#.net.

I have some files in vb.net that have “Option Strict Off” to allow for bad programming. When I convert to c# I use “dynamic” until I come back and fix problems, and this works in all cases

But now I have this code:

Public Class ContractResults
   'Big class definition
   Public Shared Sub CleanCache()
       'Code here
   End Sub
End Class

And in a file with Option Strict Off:

Public Sub VerifyResults(result as Object)
   'Here, result is normally ContractResults
   'first it check for that then call this:
   result.CleanCache()
End Sub

In c# I use “dynamic”, but a runtime error pops up when I call “static” method with dynamic reference. In vb.net, I can called “shared” sub from instance, but in c# this is not allowed

Exception:
“Microsoft.CSharp.RuntimeBinder.RuntimeBinderException”
“Member ‘ContractTypes.ContractResults.CleanCache()’ cannot be accessed with an instance reference; qualify it with a type name instead”

It seems I must convert code to use actual type, but then this means much rewriting of more parts. Is anyone able to show another way?

I want to make sure you do not think I can use

(result as ContractResults).CleanCache();

Because all types that may be passed in have “CleanCache()” method, but do not inherits from anything the same other than “Object”. There are many types (30!) that have this “static” method and so that is why it uses Option Strict Off

Answer 1

You could use reflection:

result.GetType().InvokeMember("CleanCache", BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy, null, null, new object[0]);

(untested)